DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Framing and Foundation > Mystery plumbing in Basement???

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 03-05-2009, 08:47 PM  
Junior Member
Join Date: Mar 2008
Posts: 5
Liked 2 Times on 1 Posts

Default Mystery plumbing in Basement???

My house is a amall ranch with a full basement built around 1950. I have a small plug in the floor. I can't figure out what it is.

I was thinking perhaps at one point it was a sump pit that was sealed over. The cement has obviously been patched around the pipe about the diameter of a sump pit. Perhaps the basement was always dry so someone decided to seal it, and leave a plug in case they ever needed to drain the basement?? Maybe it connects to a perimeter drain sytem?? Someone suggested perhaps it was an old drywell which seemed odd to me but who knows. There are old water hookups in that area, and I believe at one point there was probably a washer and dryer there. Can't connect to a storm sewer as we don't have any. My sanitary sewer line runs out about 4' above the floor so it can't connect to that. It's about 4-5' from the end basement wall, and about 2-3' from the back wall (roughly).

I started to chip away at the concrete at one point but decided that might not be a good idea. Of course I've tried to remove the plug without success as well.

Pics below. Any Ideas??????

pkovo is offline  
Reply With Quote
Old 04-18-2009, 08:21 PM  
Junior Member
Join Date: Apr 2009
Posts: 3

Hi pkovo,
If I had to take a guess, I would say it used to be a shallow well, or a supply line from a well located somewhere outside the home.

Is your home currently on a city/rural water system?
If so do you know when it was connected to that system?

mrivers is offline  
Reply With Quote
Old 04-18-2009, 10:26 PM  
Emperor Penguin
Nestor_Kelebay's Avatar
Join Date: Mar 2009
Location: Winnipeg, Manitoba
Posts: 1,844
Liked 2 Times on 2 Posts



Where I live, if a drain pipe under your concrete basement floor changes direction, then the plumbing code requires that a clean out be installed at that change in direction so that each straight section of pipe can be cleared separately.

I really don't know the reason for this rule.

So, it's purely a guess, but it might be that there's a change in direction of a 1 1/2 inch drain pipe under the concrete at that spot.

I'd be inclined to use an electric impact wrench to remove that plug and put in a new one with antiseize compound on the threads. That way you'll stand a better chance of getting it out if and when you need to.

Last edited by Nestor_Kelebay; 04-18-2009 at 10:32 PM.
Nestor_Kelebay is offline  
Reply With Quote
Old 04-19-2009, 04:24 PM  
Senior Member
Join Date: Mar 2006
Posts: 2,990
Liked 4 Times on 4 Posts


Hello PKovo:
It could very well be a washer drain that used to drain into a sump where a pump would take it out.
glennjanie is offline  
Reply With Quote
Old 04-20-2009, 07:27 AM  
Massive Tool Belt
Join Date: Oct 2006
Posts: 262

Looks like a good place to trip!
Quattro is offline  
Reply With Quote
Old 04-20-2009, 09:53 AM  
Senior Member
Join Date: Mar 2006
Posts: 409

Personally, I wouldn't touch it. What if it's a sanitary sewer line and the pipe breaks off? Remember what they said about curiousity....
CraigFL is offline  
Reply With Quote
Old 04-20-2009, 03:43 PM  
inspectorD's Avatar
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 4,490
Liked 265 Times on 209 Posts
Likes Given: 772

Default Hmmm

Do you have a steam heat system? If you do this could also be the return condensate line back to the boiler.

Other than that it is most likely a clean out plug to an abandonded sink line from a washtub in the basement to the outside drywell. We find them all the time.
Just My
Made in the
inspectorD is offline  
Reply With Quote
Old 03-26-2017, 09:35 PM  
Junior Member
Join Date: Mar 2008
Posts: 5
Liked 2 Times on 1 Posts


I never figured thisnout, and managed to leave it alone. Guessing inspectorD's thought of it being a cleanout for an old wash sink is probably likely. Laundry area used to be around that spot.
pkovo is offline  
People Like This 
Reply With Quote
Old 03-26-2017, 10:21 PM  
slownsteady's Avatar
Join Date: Jun 2009
Location: Newton, NJ
Posts: 6,455
Liked 1160 Times on 962 Posts
Likes Given: 1905


Welcome back, pkovo. Why such a long delay?

Learn something every day
slownsteady is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Van mystery Rusty General Chit-Chat 13 07-22-2017 11:24 AM
Contractor left a hole in the basement floor after moving plumbing. Does it matter? cad1857 Bricks, Masonry and Concrete 17 09-23-2016 12:19 PM
Basement Plumbing and Flooding Questions 1victorianfarmhouse Plumbing Forum 12 04-22-2013 09:43 PM
Mystery pipe with a 'G' on the cap in basement tyalkin Plumbing Forum 11 07-08-2011 08:24 PM
Question about basement shower-plumbing problem JONES-SMITH Plumbing Forum 3 02-01-2009 04:37 PM

Newest Threads